Improvement in mill-shafting



UNITED STATES@ PATENT OEEIoE,

EDWARD BANCROFT, OFPIIILADELPHIA, PENNSYLVANIA.

IMPROVENIAENT IN MILL-SHAFTING.

Specification forming part of Letters Patent No. 6,1164, dated May 2,2,1849.

To all whom it may concern:

Be it known that I, EDWARD BANouoFT, ofthe city and county ofPhiladelphia, and State of Pennsylvania, have invented a new and usefulImprovement in Mill-Shafting, and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawings,making a part of this specification, in which- Figures 1 and 2 aregeometrical elevations of a complete hanger 5 Fig. 3, a section of thelower part thereof, including the box; and Fig. 4, a representation ofone of the screwbolts f, which serve as pivots for the box.

The improvement referred to consists in making' the hangers or bearingswhich sustain the shafts in such a manner that they shall at all timesand under any circumstances conform accurately to the journals of theshafts, and, at the same time, not be more liable to be thrown out ofline than hangers of the ordinary construction; and, further, in makingthe oil-catcher form a part of the box of the hanger by casting itthereto, thus giving it additional strength without unnecessarilyincreasing its weight. Said hanger is constructed of four main parts,viz.-the upper or main bow, A, the lower bow, B, the lower section, C,ofthe box, to which the oilcatcher D is cast, and the upper section orcap, E, of the box.

The upper or main bow is attached to the floor or timbers ofthe mill bymeans of screwbolts passing through the holes a (indicated by dots) nearits extremities. To the under side of said bow the lower bow isattached, in any desired position, by means of the strong screw-bolt band nut c in the -center thereof. The meeting surfaces of the bows aremade perfect planes, so as to produce a close joint, and the peripheriesof said surfaces are perfectly circular, of a corresponding diameter.The lower section of the box is accurately titted in between thedownwardtending extremities l of the lower bow, and the cap of the boxis closely fitted in between the ilanges e of the lower box-section, andon it. Said flanges, continuing downward, connect the oil-catcher withthe box. A screw-bolt, f, the extremity of which is without a thread,(see Fig. 4,) passes through a hole, g, furnished with a screw-thread,in each of the extremities of the lower bow, thence through a smoothcylindrical perforation, h, in the corresponding flange of the lowersection of the box, and then into a smooth cylindrical socket or cavity,t', in the cap of the box. The smooth extremities of the saidscrew-bolts f serve as pivots, on which the box swings. By unscrcwin gthem partly, so as to clear the sockets z', the cap of the box may bcremoved withont disturbing the rest; and by further uuscrewing them, andclearing the perforations h, the lower section of the box may be takenoff without interfering with the remainder. Thus it will be perceivedthat the whole or part of the box may be removed, for whatever purposesuch removal may be required, or replaced at pleasure, by the mostsimple means.

The shaft being laid in its place determines the exact lateral positionofthe lower bow, B, after which the bolt Z1 may be firmly screwed up bymeans of the nut c.

In consequence of the box being hung on pivots it will adj ust itself toany deviation of the shaft from a horizontal line. The upper section orcap of the box is furnished with the usual oilconducting orifice k. Forsingle shafts, where the journals are at the ends, the box may be madein one piece, dispensing with the cap.

The advantages possessed by this hanger over those heretofore used are,rst, the shaft always having command of its own bearing, a complete andaccurate adjustment of one to the other is always secured, therebyrequirin g much less oil, being free from all friction, except that dueto its weight only; secondly, the oil-catcher, forming a part of thebox, is

always secure in its place, and not liable tobe deranged or lost, orhave the oil spilled or thrown out; thirdly, the facility afforded fortaking the cap off the box 011 examining the box and shaft, andreplacing it without liability of getting any part thereof out of itsproper adjustment; fourthly, its neat and smooth exterior, rendering` iteasy to keep clean; and, flfthly, its oheapness and durability.'

I do not claim the suspending a boX or bearing on pivots, this havingbeen done before; nor do I claim the making the hanger in several parts;but

What I do claim as my invention, and desire to secure by Letters Patent,is-

The general arrangement and construction of the complete hanger, with orWithout the oil-catcher forming a part thereof, made substantially inthe manner and for the purposes hereinabove described.

EDVARD BANGROFT.

Witnesses:

GEORGE BENNE, FRANCIS BENNE.

